Adobe Captivate CS 5.5, Mac, DVD, ENG Specifikace stáhnout pdf (Strana 160)

154

USING CAPTIVATE

Audio

Last updated 9/28/2011

Insert Silence Select the portion of the audio file where you want to insert silence, and click Insert Silence. Choose

from one of the following options:

• Start Of Audio Adds silence to the beginning of the audio file.

• End Of Audio Adds silence to the end of the audio file.

• Playhead Position This option is available only when you have not selected a portion of the audio file. The

silence is inserted at the playhead position. Use this option when you want to insert an extremely brief period of

silence.

Adjust Volume Click to increase or decrease the sound level of the audio file. There is also an option to fine-tune

quieter portions of the audio file.

• Normalize Select this option to have Adobe Captivate adjust the sound volume automatically. Normalizing

audio helps keep the sound level consistent between slides.

• Dynamics Select this option to amplify quiet sections of the audio to help compensate for variations in audio

volume.

• Ratio Specifies the maximum amplification that will be used. The default setting of 2.0 sets the quietest sections

of the audio to be amplified by a factor of 2. A higher setting can improve projects with large differences between

quiet and loud sections, but can also amplify background noise.

• Threshold Controls the amplification of background noise. Anything quieter than the noise threshold is not

amplified. If background noise is amplified too much, setting a higher noise threshold may help solve the problem.

Note that the Dynamics option does not work well with high noise levels.

Zoom In and Zoom Out Use the slider to enlarge or shrink the waveform.

Settings Click to set various options such as recording device, audio quality level, and recording device calibration.

Podcast Export the audio file as a WAV or mp3. You can later use these files for podcasting. Podcasting refers to

distributing files over the Internet through web feeds to portable media players, and computers.

Waveform Displays the audio file graphically. The waveform is a visual representation of the audio file.

Record Audio Click to begin recording audio. (To record, you need a microphone.)

Stop Click to stop playing the audio file.

Play Click to play the audio file.

Status Displays the status of the audio file as playing, ready, and so on.

Playhead Displays the selected location, in seconds, within the audio file. For example, if you are working with an

audio file that is 10 seconds long and you click in the middle of the file, this playhead area displays approximately

00.05.00, or 5 seconds.

Duration Displays the total amount of time it takes for the audio file to play.

Selected Displays the total amount of time selected. For example, suppose you have an audio file that is 20 seconds

long. If you click at the beginning of the file and drag to the middle, you will have selected approximately a 10-

second span of the file.

Scale Displays the scale at which the waveform is displayed. (To change the scale, use the Zoom slider).

Library Displays the Select Audio From Library dialog box, where you can browse to a new audio file and import it.

Click Select Audio From Library to import an audio file from the project’s Library.

3 When you finish editing the audio file, click Save.

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Adobe Captivate CS 5.5, Mac, DVD, ENG Specifikace Strana 160

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